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64 results about "Great vessels" patented technology

Great vessels are the large vessels that bring blood to and from the heart. Transposition of the great vessels is a group of congenital heart defects involving an abnormal spatial arrangement of any of the great vessels.

Method for forming a blood flow in surgically reconstituted segments of the blood circulatory system and devices for carrying out said method

The invention relates to clinical cardiology and cardiovascular surgery. The method for forming a blood flow in research stands and in surgically reconstructed segments of the blood circulation system comprises diagnosing the individual condition of a patient's blood circulation system; measuring the blood flow velocity field in the heart chambers and great vessels; comparing the parameters measured against the physiological norm; determining parameters forming a swirled blood flow; and modeling an individual swirled blood current in the blood circulation system being diagnosed, the streamlined surfaces and guide elements of flow channels of the blood circulation system reconstructed being given shapes conforming to the flow lines of the restored normally swirled blood flow in accordance with formulas:
Q(t)=[z+Z0(t)]2(1.1)ϕ=ϕ0+k(t)z(1.2)k(t)=Γ0(t)/4πQ(t)C0(t)Vz=2C0(t)zVr=-C0(t)rVϕ=Γ0(t)2πr{1-exp[-C0(t)r22v]}(1.3)
wherein: Vr, Vz, and Vφ are the radial, longitudinal, and tangential velocities of the swirled current; v is the kinematic viscosity of the medium; φ0 is the initial swirling angle in relation to the flow axis normal; φ, z and r are current values of the angular, longitudinal, and radial coordinates along the flow line; and Q(t), Z0(t), k(t), Γ0(t), and C0(t) are parameters of the swirled blood flow variable over time because of the non-stationary current and corresponding to the individual normal indicators for a physiologically swirled blood flow. The normal indicators are established by routine examination of a representative sample of patients having no changes in the cardiovascular system. A vessel prosthesis comprises a tube having an internal surface in contact with the blood flow provided with a pattern to swirl the blood flow in accordance with formulas (1.1 to 1.3) conforming to a specific localization of the segment being reconstructed. A cannula for para-corporeal perfusion devices comprises a flow channel having an internal surface that is provided with a longitudinal pattern to swirl the blood flow, the shape of the pattern being determined from formulas (1.1 to 1.3), relative to the specific localization of the point where the cannula is inserted into the vessel channel. A heart valve prosthesis comprises one or more shutoff elements arranged symmetrically in the center of a body of round and/or oval cross-section, the streamlined surfaces of the valve being provided with a pattern in accordance with formulas (1.1 to 1.3). A blood pump comprises a flow swirling unit, a flow channel, and valves at the inlet and outlet of the channel, the surface washed over by blood being provided with a relief variable over time in accordance with formulas (1.1 to 1.3). A swirling device comprises an end piece having a streamlined surface provided with guides in the form of ribs, grooves, or blades of a shape defined by formulas (1.1 to 1.3), the swirling angle of the guides relative to the flow axis being varied optionally an operator or by a special-purpose device for modeling different current conditions.
Owner:BOKERIYA LEO ANTONOVICH +2

Devices and methods for intracardiac procedures

The invention provides devices and methods for performing less-invasive surgical procedures within an organ or vessel. In an exemplary embodiment, the invention provides a method of closed-chest surgical intervention within an internal cavity of a patient's heart or great vessel. According to the method, the patient's heart is arrested and cardiopulmonary bypass is established. A scope extending through a percutaneous intercostal penetration in the patient's chest is used to view an internal portion of the patient's chest. An internal penetration is formed in a wall of the heart or great vessel using cutting means introduced through a percutaneous penetration in an intercostal space in the patient's chest. An interventional tool is then introduced, usually through a cannula positioned in a percutaneous intercostal penetration. The interventional tool is inserted through the internal penetration in the heart or great vessel to perform a surgical procedure within the internal cavity under visualization by means of the scope. In a preferred embodiment, a cutting tool is introduced into the patient's left atrium from a right portion of the patient's chest to remove the patient's mitral valve. A replacement valve is then introduced through an intercostal space in the right portion of the chest and through the internal penetration in the heart, and the replacement valve is attached in the mitral valve position.
Owner:EDWARDS LIFESCIENCES LLC

Devices and methods for intracardiac procedures

The invention provides devices and methods for performing less-invasive surgical procedures within an organ or vessel. In an exemplary embodiment, the invention provides a method of closed-chest surgical intervention within an internal cavity of a patient's heart or great vessel. According to the method, the patient's heart is arrested and cardiopulmonary bypass is established. A scope extending through a percutaneous intercostal penetration in the patient's chest is used to view an internal portion of the patient's chest. An internal penetration is formed in a wall of the heart or great vessel using cutting means introduced through a percutaneous penetration in an intercostal space in the patient's chest. An interventional tool is then introduced, usually through a cannula positioned in a percutaneous intercostal penetration. The interventional tool is inserted through the internal penetration in the heart or great vessel to perform a surgical procedure within the internal cavity under visualization by means of the scope. In a preferred embodiment, a cutting tool is introduced into the patient's left atrium from a right portion of the patient's chest to remove the patient's mitral valve. A replacement valve is then introduced through an intercostal space in the right portion of the chest and through the internal penetration in the heart, and the replacement valve is attached in the mitral valve position.
Owner:EDWARDS LIFESCIENCES LLC

Methods and apparatus for artificial disc replacement (ADR) insertion and other surgical procedures

Improved methods and apparatus render ADR insertion safer and more precise. Certain surgical instruments according to the invention include a level enabling a user to align the instrument for proper placement of a surgical implant. A different surgical instrument includes two or more scopes mounted relative to the instrument permitting a user to simultaneously view more than one side of the instrument. A device for use with a surgical instrument having a long shaft includes a holder that surrounds at least a portion of the shaft allowing a user to control the instrument with both hands. A further surgical instrument comprises a set of retractors and one or more guards placed over the retractors for protecting the great vessels, nerves or other delicate structures during a surgical procedure. Surgical apparatus according to the invention comprises a platform mountable to an operating room table over a patient undergoing a surgical procedure, enabling a user to place their hands or attach an instrument while operating. Different surgical instruments include an indicator showing angular displacement or a wedge-shaped portion used for disc distraction. Also disclosed are blades designed for use with a power tool featuring a cutting edge configured such that rapid oscillation of the cutting tool reduces the pressure a user must apply the tool.
Owner:ANOVA

Protecting biological structures, including the great vessels, particularly during spinal surgery

Natural and / or synthetic materials to form a strong barrier between the skeletal system and the great vessels. In the preferred embodiments, a natural or synthetic material is used to prevent scar tissue from forming around the vessels and / or to act as barrier placed between the vessels and the skeletal system, including the spine. Devices according to the invention may also be used over the dura and nerves following laminectomy procedures, between the sternum and the pericardium or heart following cardiac procedures, in intra-abdominal procedures such as intestinal or vascular surgery, over the brain in intra-cranial surgery, over the ovaries or other organs or tissues in the female genitourinary system, over the prostate or other organ or tissues in the male genitourinary system, or in other surgeries on humans or animals.
Owner:FERREE BRET A

Method for precisely simulating radiofrequency ablation technology by utilizing ellipsoid to cover tumor

ActiveCN105997245AReduce harmAccurate and effective implementationImage enhancementImage analysisAbnormal tissue growthRf ablation
The invention relates to a liver tumor radiofrequency ablation technology, and aims at providing a method for precisely simulating radiofrequency ablation technology by utilizing ellipsoid to cover tumor. The method for precisely simulating radiofrequency ablation technology by utilizing ellipsoid to cover tumor comprises the following steps: preprocessing tumor images; clustering the tumor images into a plurality of ellipsoidal subclasses under reasonable constraint conditions; calculating the minimal coverage ellipsoids of each obtained class; giving an initial radiofrequency scheme by utilizing the number of the minimal ellipsoids automatically determined; determining an adjustable conical area, and manually adjusting the initial radiofrequency direction so as to completely keep away from great vessels and ribs, thus completing the establishment of the final radiofrequency scheme. According to the method, the purpose of designing the radiofrequency treatment scheme before operation can be realized, three-dimensional navigation can be conducted during operation, the adopted optimized algorithm can help a doctor more precisely and efficiently do operation, the harm of the operation to normal tissues can be reduced as far as possible, and the peripheral organs can be avoided, so that the radiofrequency ablation operation is safer and more effective.
Owner:中关村科技租赁股份有限公司

Puncture navigation method for CT guided liver tumor radiofrequency ablation

The invention discloses a puncture navigation method for CT guided liver tumor radiofrequency ablation. The method comprises the steps that markers which can be identified by CT are placed on the bodysurface of a patient suffered from liver tumor, and three-dimensional structures of the liver tumor, liver and key dissection structures (great vessels, lung, heart, stomach, kidney, gallbladder, skin and skeleton) are automatically and rapidly extracted from CT sequence scanning images in the CT guided liver tumor radiofrequency ablation; real-time automatic planning of puncture routes is conducted to obtain the optimal puncture route; spatial matching is conducted on a patient coordinate system P, a CT image coordinate system I and an electromagnetic positioning instrument coordinate systemE; information of the starting point, ending point, length, angle and the like of the optimal puncture route is displayed in CT image space; the moving of needle tip of an ablation needle is executedto reach the starting point of the optimal puncture route to conduct real-time navigation; after the needle tip of the ablation needle is moved to the starting point of the optimal puncture route, real-time navigation of the puncturing of the ablation needle is executed.
Owner:BEIJING UNIV OF TECH

Starch stypticum and preparation method thereof

The invention discloses a starch stypticum and a preparation method thereof, belonging to the field of medical preparations. The preparation method comprises the following steps: refining waxy maize starch to 4,000 to 10,000 meshes; centrifugally filtering after crosslinking, acidolysis and enzymolysis are completed; cleaning with distilled water; blasting and drying at constant temperature until the weight is constant; crushing, and screening through a 200-mesh screen; radiating by Co60 to disinfect to prepare the starch stypticum. The water absorption rate of the starch stypticum prepared by adopting the method is 2 to 3 times that of the conventional styptic materials, the starch stypticum can quickly stop bleeding in actual application, has quick styptic function in great vessel hemorrhage, even massive bleeding wound surface, and can be widely applied to surgeries of cardiothoracic and vascular surgery department, hepatobiliary surgery department, orthopedics department, general surgery department, obstetrics and gynecology department, urology surgery department and ear-nose-throat department and the like.
Owner:北京爱特康医疗科技有限公司

Locating method for magnetic resonance

The invention relates to a positioning method for magnetic resonance. The method comprises the following steps: a, displaying a schematic diagram with a human body model and a scanning coil on visible human-machine interactive equipment which is arranged in a magnetic resonance equipment scanning room; b, starting a positioning beam after a patient lies on a bed in a magnetic resonance cavity, and positioning the positioning beam according to the position of the scanning coil; c, selecting the part to be scanned of the patient on the human-machine interactive equipment; d, moving the bed until the selected scanning part displayed on the human-machine interactive equipment is positioned under the positioning beam. The positioning method can be used for effectively positioning coils for performing combined scanning on the belly or great vessels and the like, so that coordinate information of unfixed important coil units can be acquired, and an operator can carry out positioning operation without repeatedly entering the scanning room. Therefore, the scanning efficiency is greatly improved, and the cost on scanning time of coil positioning in a pre-scanning mode can be eliminated.
Owner:ALLTECH MEDICAL SYST

Covered stent used in chest great vessel cavity

InactiveCN104352288ANo local abnormal stressLocal abnormal stress preventionStentsBlood vesselsAorta aorticStraight tube
The invention relates to a covered stent used in a chest great vessel cavity. Compared with the prior art, the defects that a covered stent is incapable of overcoming straightening force and is poor in practicability are overcome. The covered stent comprises artificial blood vessels (1) and support frames (2), wherein each artificial blood vessel (1) comprises a plurality of straight pipes and a plurality of pleated pipes; the straight pipes are connected at intervals through the pleated pipes; the support frames (2) are wrapped on each straight pipe respectively; the straight pipes are arranged at the two ends of each artificial blood vessel (1) respectively. The covered stent has certain longitudinal stretching deformation capacity, can fit the physiological bending of an aorta, and eliminates the straightening force after a traditional stent is bent, so that the blood vessel wall of the aorta is uniformly stressed.
Owner:章庆春 +1
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